History of Astronomy |
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Page 22
He adopted the epicycles and deferents which had been used by Apollonius and
others to explain the retrograde motions of the planets . We , who know that the
earth revolves round the sun once in a year , can understand that the apparent ...
He adopted the epicycles and deferents which had been used by Apollonius and
others to explain the retrograde motions of the planets . We , who know that the
earth revolves round the sun once in a year , can understand that the apparent ...
Page 23
It did not occur to Ptolemy to place the centres of the epicycles of Mercury and
Venus at the sun , and to extend the same system to the major planets .
Something of this sort had been proposed by the Egyptians ( we are told by
Cicero and ...
It did not occur to Ptolemy to place the centres of the epicycles of Mercury and
Venus at the sun , and to extend the same system to the major planets .
Something of this sort had been proposed by the Egyptians ( we are told by
Cicero and ...
Page 30
As has been already stated , his successor , Tycho Brahe , supported the same
use of epicycles and excentrics as Copernicus , though he held the earth to be
fixed . But Tycho Brahe was eminently a practical observer , and took little part in
...
As has been already stated , his successor , Tycho Brahe , supported the same
use of epicycles and excentrics as Copernicus , though he held the earth to be
fixed . But Tycho Brahe was eminently a practical observer , and took little part in
...
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Contents
ANCIENT GREEK ASTRONOMY | 3 |
GALILEO AND THE TELESCOPENOTIONS OF GRAVITY | 46 |
NEWTONS SUCCESSORS HALLEY EULER | 60 |
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Common terms and phrases
accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later light lunar Mars mass mathematical mean measured method miles moon moon's motion move nebulæ Newton noted noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY
Bibliographic information
| Title | History of Astronomy The history of science series |
| Author | George Forbes |
| Publisher | Watts, 1921 |
| Original from | Indiana University |
| Digitized | 5 Aug 2010 |
| Length | 150 pages |
| Export Citation | BiBTeX EndNote RefMan |